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All Micrologic trip units provide impeccable, electronic circuit protection with adjustable protection settings for maximum system coordination and flexibility. Sophisticated functionality, such as energy and power quality metering capabilities, is integrated in the more advanced trip units.
PowerPact® P- and R-frame molded case circuit breakers and all Masterpact® power circuit breakers are equipped with the Micrologic® trip system to protect power circuits and loads. Micrologic trip systems use a set of current transformers (called CTs or sensors) to sense the current, a trip unit to evaluate the current m and a tripping solenoid to trip the circuit breaker. Micrologic trip-units are field-interchangeable.
2.0 – LS0: Long Time+ Short Time+ Zero Delay protection, IEC rated
3.0 – LI: Long Time + Instantaneous protection, UL Listed and ANSI Certified
5.0 – LSI: Long Time + Short Time + Instantaneous protection, UL Listed, ANSI Certified, and IEC Rated
6.0 – LSIG: Long Time + Short Time + Instantaneous + Ground fault protection, UL Listed, ANSI Certified, and IEC Rated
Micrologic (Standard) 2.0, 3.0 and 5.0 Trip Units
Micrologic (Ammeter) 2.0A, 3.0A, 5.0A and 6.0A Trip Units
Includes all features listed for Micrologic standard trip unit, as well as:
Micrologic (Power) 5.0P and 6.0P Trip Units
Power measurement and advanced protection features includes all features listed for Micrologic ammeter trip unit, as well as:
Micrologic (Harmonic) 5.0H and 6.0H Trip Units
Power quality measurement and advanced protection features. Includes all features listed for the Micrologic P (Power) trip unit, as well as:
Resetting Peak Values on Micrologic Ammeter Trip Unit
Changing Power Sign on Micrologic Power or Harmonic Trip Unit
Viewing Peak Values on Micrologic Ammeter Trip Unit